Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b0e4a149b9de1e…

MALICIOUS

PDF

94.3 KB Created: 2021-05-22 16:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 42476794544b5d43b148a88d06b74dd3 SHA-1: 44c3acb67e4a0913b93a940a4d3adc05c74955ab SHA-256: f0b0e4a149b9de1e09e2df34b61f72c42e4eda1468afd05d2a6286c8dc4cd6f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a common tactic for SEO spam or phishing. The primary malicious URL identified is dugedepap.ru, which is likely used to distribute further malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/strik?utm_term=how+to+make+beaded+bracelets+with+clear+stretch+cord PDF link annotation
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/xevusedep.pdfIn PDF document text
    • https://rominekajamarol.weebly.com/uploads/1/3/4/0/134040464/sorinawojorexibo.pdfIn PDF document text
    • https://widuboxizivibib.weebly.com/uploads/1/3/4/3/134315701/f93aab22b08599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413735/normal_6042e0b7a9f90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478378/normal_601830f63fde2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5ffdd2e5842d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3fa6c60-d3dd-4c23-bece-e8df095b8ef6/2010_camaro_for_sale_under_10_000.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/sheet_music_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/wolujegarubuxotigegelo.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/23504554845.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/what_are_the_steps_in_writing_a_balanced_chemical_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/the_price_of_power_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/2005_dodge_dakota_repair_manual_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/fox_sports_guide_melbourne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219cab30-885b-4bd5-8537-2d042e205d12/fefovomevepez.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/the_lightning_thief_full_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfd4ffd-b66c-49dd-b555-23c729695573/metamorphic_meaning_in_urdu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13311 5436 bytes
SHA-256: 477161ebcc74d73fd99cb9c4375a567efc51800a63908973982eb6c3f1c80c75
font_01_sfnt_off0001456a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1456A 11396 bytes
SHA-256: 847d832313f5b8cb6c3226d3b75862a7982cd23ec552f5f661c203697d44286c

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